I downloded BalenaOS prod .img file(balena-cloud-beaglebone-black-2.73.1+rev2-v12.4.6.img) and burned it to a MicroSD which is 8 GB using Balena Etcher in macOS pc. Then when beagleboard black is powered of state, I inserted MicroSD to board, then power on with 5V directly with power plug. All 4 leds in board are blinking then I insert microHDMI and check the console. Only linux penguin is displayed and it waits. No log appears on console. Then only 2 leds are lighted on.
I wait more than 55 minutes nothing changed. Then I removed microSD and powered off the board. Powered on board with no MicroSD. Nothing comes in console.
In BalenaOS image version file it is MMC flasher so I expect it will flash contents to eMMC then will start from eMMC direct with no microSD.
Thanks for any comment of help!